People hand out foodstuff donated by the U.S at the West Point area that has been hard hit by the Ebola virus in Monrovia, Liberia, Tuesday, Aug. 26, 2014. The Ebola virus has the “upper hand” in an outbreak that has killed more than 1,400 people in West Africa, a top American health official has said, but experts have the tools to stop it.(AP Photo/Abbas Dulleh)

A water vendor, center, reads a warning on the door of a vehicle, left, regarding the deadly Ebola virus in Monrovia, Liberia, Tuesday, Aug. 26, 2014. The Ebola virus has the “upper hand” in an outbreak that has killed more than 1,400 people in West Africa, a top American health official has said, but experts have the tools to stop it.(AP Photo/Abbas Dulleh)

Liberian security forces with riot gear stop people from leaving the West Point area, that has been hardest hit by the Ebola virus spreading in Monrovia, Liberia, Monday, Aug. 25, 2014. A Liberian doctor who was among three Africans to receive an experimental Ebola drug has died, the country's information minister said Monday.(AP Photo/Abbas Dulleh)

MONROVIA, Liberia (AP) — The Ebola virus may have the "upper hand" in an outbreak that has killed more than 1,400 people in West Africa but experts can stop the virus' spread, a top American health official said at the start of his visit to the hardest-hit countries.

Dr. Tom Frieden, director of the U.S. Centers for Disease Control and Prevention, was in Liberia on Tuesday, and later plans to stop in Sierra Leone and Guinea. Nigeria also has recorded cases, but officials there have expressed optimism that its spread can be controlled.

"Lots of hard work is happening, lots of good things are happening," Frieden told a meeting attended by President Ellen Johnson Sirleaf on Monday. "But the virus still has the upper hand."

Even as Liberia resorts to stringent measures to try to halt the spread of Ebola, frustration mounted over the slow collection of dead bodies from neighborhoods of Monrovia. One group of residents attached plastic ties to the wrists and ankles of one suspected Ebola victim and dragged his corpse to a busy street, according to an Associated Press journalist at the scene.

Authorities have decreed that all Ebola victims must be collected by government health workers and cremated, as contact with bodies can transmit the virus.

In Nigeria, two more Ebola patients were declared to have survived the disease and were released from hospital, said Health Minister Onyebuchi Chukwu on Tuesday. Five people have died from the disease in Nigeria, while a total of seven have recovered. One person remains in the hospital in an isolation ward, said Chukwu.

The current outbreak is the largest ever and experts have struggled to contain it for a host of reasons: doctors took a long time to identify it, it is happening in a region where people are highly mobile, it has spread to densely populated areas and many people have resisted or hid from treatment. The disease has overwhelmed already struggling health systems in some of the world's poorest countries.

But CDC director Frieden expressed optimism that the outbreak can be contained.

"Ebola doesn't spread by mysterious means, we know how it spreads," he said in his remarks, which were broadcast on Liberian TV. "So we have the means to stop it from spreading, but it requires tremendous attention to every detail."

Liberian officials already have sealed off an entire slum neighborhood in the capital. Sirleaf also has declared a state of emergency, and ordered all her ministers and top government officials to remain in the country or return from any trips.

Late Monday, her office said in a statement that any official who defied that order had been fired. The order was issued a few weeks ago and officials had been given a week to return. The statement did not say how many or who had been fired.

According to the latest World Health Organization tally, the Ebola outbreak has killed 1,427 people of the 2,615 sickened. The U.N. health agency says that 240 health care workers have been infected with Ebola, calling that an unprecedented number. Half of those infected have died.

The agency said that the high number of infections among health workers is due to a shortage of protective gear and its improper use and a shortage of staff to treat the tremendous influx of patients.

In the current outbreak as many as 90,000 protective suits will be needed every month, according to Jorge Castilla, an epidemiologist with the European Union Commission's Department for Humanitarian Aid. That estimate takes into account a recent increase in the number of beds available for treating Ebola patients and more stringent standards to protect health workers.

There has been a severe shortage of that equipment that is only now beginning to be resolved, he said. He did not say exactly how many suits were lacking.

The outbreak also desperately needs more workers to trace the people that the sick have come into contact with and more centers where patients can be screened for the disease in a safe way that contains any Ebola infections, said Castilla, who recently returned from a trip to Guinea, Liberia and Sierra Leone.

A separate Ebola outbreak emerged over the weekend in Congo, though experts say it is not related to the West African epidemic. Doctors Without Borders, which is running many of the treatment centers in the West Africa outbreak, said it was also sending experts and supplies to Equateur, a northwestern province of Congo. But the medical charity has already warned that its resources already were stretched.

"In normal times, we're able to mobilize teams specializing in hemorrhagic fevers, but currently we are facing an enormous epidemic in West Africa, limiting our capacity to respond to the outbreak in Equateur province," said Jeroen Beijnberger, the group's medical coordinator in Congo.

*We welcome your comments on the stories and issues of the day and seek to provide a forum for the community to voice opinions. All comments are subject to moderator approval before being made visible on the website but are not edited. The use of profanity, obscene and vulgar language, hate speech, and racial slurs is strictly prohibited. Advertisements, promotions, spam, and links to outside websites will also be rejected. Please read our terms of service for full guides